Scatter attenuation tomography using a monochromatic radiation source
First Claim
1. An x-ray inspection system for characterizing an object, the x-ray inspection system comprising:
- a source for generating an incident beam of substantially monochromatic penetrating radiation, the incident beam characterized by a propagation axis and a source energy;
a plurality of detector elements disposed about the beam of penetrating radiation, each detector element generating a detector signal characterizing a detected energy of scattered radiation;
a processor input adapted to receive the detector signal characterizing radiation scattered from at least one scattering point of the object illuminated by the incident beam; and
a processor adapted to determine a displacement for each scattering point of the object relative to a fiducial position on the propagation axis of the incident beam on a basis of the detected energy of the scattered radiation.
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Accused Products
Abstract
A system and methods for characterizing an inspected object on the basis of attenuation between identified regions of scattering and a plurality of detectors. An incident beam of substantially monochromatic penetrating radiation is generated by a source, which may be a radioactive source. The incident beam is characterized by a propagation axis and a source energy. Radiation scattered by the object is detected by means of a plurality of detector elements disposed about the beam of penetrating radiation, each detector element generating a detector signal characterizing a detected energy of scattered radiation. The detector signal provides for determining a displacement for each scattering point of the object relative to a fiducial position on the propagation axis of the incident beam, based upon the detected energy of the scattered radiation. By calculating the attenuation of penetrating radiation between pairs of scattering voxels, a tomographic image is obtained characterizing the three-dimensional distribution of attenuation in the object of one or more energies of penetrating radiation, and thus of material characteristics.
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Citations
15 Claims
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1. An x-ray inspection system for characterizing an object, the x-ray inspection system comprising:
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a source for generating an incident beam of substantially monochromatic penetrating radiation, the incident beam characterized by a propagation axis and a source energy; a plurality of detector elements disposed about the beam of penetrating radiation, each detector element generating a detector signal characterizing a detected energy of scattered radiation; a processor input adapted to receive the detector signal characterizing radiation scattered from at least one scattering point of the object illuminated by the incident beam; and a processor adapted to determine a displacement for each scattering point of the object relative to a fiducial position on the propagation axis of the incident beam on a basis of the detected energy of the scattered radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for characterizing an object on the basis of a measure of attenuation in a direction having a transverse component to an incident beam, the method comprising:
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generating an incident beam of substantially monochromatic penetrating radiation, the incident beam characterized by a propagation axis and a source energy; detecting radiation scattered by the object by means of a plurality of detector elements disposed about the beam of penetrating radiation, each detector element generating a detector signal characterizing a detected energy of scattered radiation; receiving the detector signal characterizing radiation scattered from at least one scattering point of the object illuminated by the incident beam; and determining a displacement for each scattering point of the object relative to a fiducial position on the propagation axis of the incident beam on a basis of the detected energy of the scattered radiation. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification